how do you pay? i not see any form to setting my paypal email address? and what is minimal earning to make withdraw etc...?

If you refer someone, you will see the number of people you referred on your forum pagehttp://spebid.com/members/index.php?action=profile;area=forumprofileYour referred friend subscribes for 1year membership(i.e becomes SPEBID SHOPPER), you will earn US$3. You can monitor your referred members status change. Just inviting friends doesnt qualify for earnings, as you know anyone can create multiple emails. Thank you.